Research on Energy Absorbing Structures. Part X.
Abstract
An analytical method for predicting the elastic-plastic bending of rectangular plates with large deflection is studied. The effects of plastic strain and large deflection on plate deformation are shown to be the same as a set of applied external forces on the plate in the classical elastic small deflection theory. For the plate considered, the deflection is increased only slightly by plastic strain; however, the maximum extreme fiber stress is considerably relieved by plastic yielding. A method is developed for a solution of the stress field in a semi-infinite elastic-plastic medium under a generalized plane deformation. The slip field and the build-uup of local plastic strain at the free surface under cyclic loading are calculated. This local plastic strain build-up is used as the criterion for estimating early fatigue damage. Active slip on secondary slip systems is considered during fatigue cycling. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1972
- Accession Number
- AD0746046
Entities
People
- Bernard Maxelsky
- Robert R. Hewitt
- Sheng-rong Lin
- T. H. Lin